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Indexed by:期刊论文

Date of Publication:2011-02-01

Journal:MAGNETIC RESONANCE IMAGING

Included Journals:Scopus、SCIE、PubMed

Volume:29

Issue:2

Page Number:281-288

ISSN No.:0730-725X

Key Words:Tetrahydrofuran hydrate; Porous media; Formation; Dissociation; MRI

Abstract:Tetrahydrofuran (THF) hydrate has long been used as a substitute for methane hydrate in laboratory studies. This article investigated the formation and dissociation characteristics of THF hydrate in porous media simulated by various-sized quartz glass beads. The formation and dissociation processes of THF hydrate are observed using magnetic resonance imaging (MRI) technology. The hydrate saturation during the formation is obtained based on the MRI data. The experimental result suggests that the third surface has an effect on hydrate formation. THE hydrate crystals lean to form on the glass beads and in their adjacent area as well as from the wall of the sample container firstly. Furthermore, as the pore size diminishes, or as the formation temperature decreases, the nucleation gets easier and the formation processes faster. However, the dissociation rate is mostly dependent on the dissociation temperature rather than on the pore size. (C) 2011 Elsevier Inc. All rights reserved.